The waterbuck is a reasonably large antelope species which is found in Sub-Saharan Africa.
Waterbuck have a relatively simple defence strategy of running into water if threatened. While there was a theory that an oil they release was intended to put off crocodiles, it does not appear to work, and waterbuck do sometimes become supper for crocodiles. Being quite large, perhaps crocodiles usually ignore them. There are just 2 recognized subspecies, though this is down from around 8 after a new assessment.
It is assessed as least concern (the Defassa waterbuck subspecies is considered near threatened.